Blank for forming a container



FIG. 1 is a top perspective view incorporating the new design;

FIG. 2 is a top plan view thereof (the bottom plan view is a minor image of the top plan view);

FIG. 3 is a left edge view thereof (the right edge view is a mirror image of the left edge view); and,

FIG. 4 is a top edge view thereof (the bottom edge view is a mirror image of the top edge view).

The dashed lines in the figures are illustrative of features that form no part of the claimed design. 

CLAIM The ornamental design for a blank for forming a container, as shown and described. 